### Technical Overview: 5TTP 10-R Fuse The **5TTP 10-R** is a high-performance, time-delay (slow-blow) subminiature axial lead fuse manufactured by **Bel Fuse Inc.** It is designed primarily for electronic circuits where temporary power surges (inrush currents) are expected. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Part Number** | 5TTP 10-R | | **Current Rating** | 10 Amperes (10A) | | **Voltage Rating** | 125V AC | | **Response Time** | Time-Delay / Slow-Blow | | **Package Type** | Subminiature Axial Lead (2AG / 5x15mm style) | | **Body Material** | Glass | | **RoHS Compliant** | Yes (indicated by the "-R" suffix) | | **Interrupting Rating** | 100A @ 125V AC | --- ### 2. Physical Design and Components The "5TTP" series features a specific form factor that differs from standard 5x20mm fuses. * **Glass Body:** Allows for easy visual inspection to see if the fuse element has melted (blown). * **Axial Leads:** The fuse includes wire leads soldered to the end caps, designed for **Through-Hole Technology (THT)** mounting directly onto a Printed Circuit Board (PCB). * **Size:** It is a 5mm diameter by 15mm length fuse, making it more compact than standard industrial fuses. --- ### 3. Electrical Characteristics #### Time-Delay Functionality The "Slow-Blow" characteristic is the most critical feature of the 5TTP 10-R. It is engineered to: * **Withstand Inrush:** Ignore short-duration high-current spikes caused by motor startups or capacitor charging. * **Thermal Protection:** Open the circuit if a sustained overcurrent condition occurs that could damage components or cause a fire. #### The "-R" Suffix The "-R" in the part number denotes that the component is **Lead-Free** and meets **RoHS** (Restriction of Hazardous Substances) standards, making it suitable for modern environmentally-conscious manufacturing. --- ### 4. Common Applications Due to its high current rating (10A) and slow-blow nature, it is typically found in: 1. **Power Supplies:** Protecting the primary side of AC/DC converters. 2. **Consumer Electronics:** Televisions, chargers, and audio equipment. 3. **Industrial Equipment:** Small motors or actuators where initial torque requires a high current burst. 4. **LED Lighting Drivers:** Handling the initial surge when the lights are switched on. ---